Bicycle



FIG. 1 is a left side view of a bicycle showing my new design;

FIG. 2 is a right side view of the bicycle;

FIG. 3 is a top view of the bicycle;

FIG. 4 is a bottom view of the bicycle;

FIG. 5 is a back view of the bicycle; and,

FIG. 6 is a front view of the bicycle.

The broken lines in the drawings illustrate portions of the bicycle that forms no part of the claimed design. 

CLAIM The ornamental design for a bicycle, as shown and described. 